(19)
(11)
EP 0 393 085 A1
(12)
(43)
Date of publication:
24.10.1990
Bulletin 1990/43
(21)
Application number:
88909885.0
(22)
Date of filing:
19.08.1988
(51)
International Patent Classification (IPC):
G01C
19/
64
( . )
H01S
3/
083
( . )
G01C
19/
66
( . )
(86)
International application number:
PCT/US1988/002867
(87)
International publication number:
WO 1989/001605
(
23.02.1989
Gazette 1989/05)
(84)
Designated Contracting States:
DE FR GB IT
(30)
Priority:
21.08.1987
US 19870088079
(71)
Applicant:
Litton Systems, Inc.
Beverly Hills California 90210-9990 (US)
(72)
Inventor:
FRIDRIC, Bernard, G.
Woodland Hills, CA 91367 (US)
(74)
Representative:
Godsill, John Kenneth
Hazlitt House 28 Southampton Buildings, Chancery Lane
London, WC2A 1AT
London, WC2A 1AT (GB)
(54)
RING LASER GYRO FRAME DESIGN RESISTANT TO THERMAL GRADIENT EFFECTS